To examine the magnitude of potential biases of transportation travel demand models used by metropolitan planning organizations to represent induced travel from expanded highway capacity, the researchers will use the state-of-the-practice transportation demand model, the Sacramento Council of Governments (SACOG) SACSIM19 model, to examine (1) the model's representation of induced travel, (2) the influence of variation in key inputs on vehicle travel and roadway congestions, and (3) the effect of changes in induced travel-related input variables on the comparisons of scenarios with and without highway expansions.
